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Journal of Materials Science

, 42:9894 | Cite as

Experimental and theoretical investigation of nonlinear viscoelastic polyurethane systems

  • Michael Johlitz
  • Holger Steeb
  • Stefan Diebels
  • Anthippi Chatzouridou
  • Jan Batal
  • Wulff Possart
Article

Abstract

The non-linear viscoelastic behaviour of a polyurethane (PUR) network is determined by continuous uniaxial tension tests and stepwise relaxation tests. Following the concept of internal variables on the modelling side, the finite Neo-Hookean material model combined with linear evolution equations for the internal variables is applied to include the time-dependence caused by viscoelasticity. The parameters are identified by an evolution strategy combined with a non-linear finite element analysis which solves the boundary value problem given by the specimen geometry and testing conditions. In conclusion, the combination of the described experiments and modelling provides a full description of the mechanical behaviour of the given PUR.

Keywords

Constant Strain Rate Uniaxial Tension Test Maxwell Element Aluminium Stripe Dogbone Specimen 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgements

The authors are grateful to the DFG (German Science Foundation—Deutsche Forschungsgemeinschaft) for financial support through the grant numbers Di 430/5-1 and Po 577/15-1.

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Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  • Michael Johlitz
    • 1
  • Holger Steeb
    • 1
  • Stefan Diebels
    • 1
  • Anthippi Chatzouridou
    • 1
  • Jan Batal
    • 2
  • Wulff Possart
    • 2
  1. 1.Chair of Applied MechanicsSaarland UniversitySaarbrückenGermany
  2. 2.Chair of Adhesion and Interphases in PolymersSaarland UniversitySaarbrückenGermany

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